CVE-2020-21236: A vulnerability in /damicms-master/admin.php?s=/Article/doedit of DamiCMS v6.0 allows attackers to compromise

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HIGH 8.8DOWNGRADE

CVE-2020-21236 is a high-severity flaw (CVSS 8.8) affecting damicms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in /damicms-master/admin.php?s=/Article/doedit of DamiCMS v6.0 allows attackers to compromise and impersonate user accounts via obtaining a user's session cookie.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-352
Published	2021-12-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: damicms

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-12-27 23:15 UTCPublished CVE record published
2026-06-17 03:03 UTCUpdated Record last modified

damicms damicms DOWNGRADE

Affected: 6.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0.0

1. Check installed version

apt-cache policy damicms || rpm -q damicms || damicms --version

2. No fixed release: DOWNGRADE to a release before 6.0.0 (Debian / Ubuntu)

apt-cache madison damicms sudo apt install damicms=<VERSION_BEFORE_6.0.0> sudo apt-mark hold damicms

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list damicms sudo dnf downgrade damicms-<VERSION_BEFORE_6.0.0> sudo dnf versionlock add damicms

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-21236?

damicms: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-21236 being exploited?

CVE-2020-21236 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-21236 affect?

CVE-2020-21236 affects damicms. Severity is high (CVSS 8.8). A vulnerability in /damicms-master/admin.php?s=/Article/doedit of DamiCMS v6.0 allows attackers to compromise and impersonate user accounts via obtaining a user's session cookie.

How urgent is CVE-2020-21236?

Priority 47/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

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CVE-2020-18451 MEDIUM 4.8 DOWNGRADE Cross Site Scripting (XSS) vulnerability exists in DamiCMS v6.0.6 via the title parameter in the doadd functio

References

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